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/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
.text
#ifdef UP
# define LOCK
#else
# define LOCK lock
#endif
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define EWOULDBLOCK 11
#define EINVAL 22
#define ETIMEDOUT 110
#define cond_lock 0
#define cond_nr_wakers 4
#define cond_nr_sleepers 8
.global __lll_cond_wait
.type __lll_cond_wait,@function
.hidden __lll_cond_wait
.align 16
__lll_cond_wait:
pushl %esi
pushl %ebx
xorl %esi, %esi
leal cond_nr_wakers(%eax), %ebx
4: movl (%ebx), %edx
testl %edx, %edx
jne 1f
LOCK
decl cond_lock-cond_nr_wakers(%ebx)
jne 2f
3: xorl %ecx, %ecx
movl $SYS_futex, %eax
int $0x80
movl $1, %eax
LOCK
xaddl %eax, cond_lock-cond_nr_wakers(%ebx)
testl %eax, %eax
je 4b
leal cond_lock-cond_nr_wakers(%ebx), %ecx
/* Preserves %ebx, %edx, %edi, %esi. */
call __lll_mutex_lock_wait
jmp 4b
1: decl (%ebx)
popl %ebx
popl %esi
ret
2: leal cond_lock-cond_nr_wakers(%ebx), %eax
/* Preserves %ebx, %ecx, %edx, %edi, %esi. */
call __lll_mutex_unlock_wake
jmp 3b
.size __lll_cond_wait,.-__lll_cond_wait
.global __lll_cond_timedwait
.type __lll_cond_timedwait,@function
.hidden __lll_cond_timedwait
.align 16
__lll_cond_timedwait:
/* Check for a valid timeout value. */
cmpl $1000000000, 4(%edx)
jae 1f
pushl %ebp
pushl %edi
pushl %esi
pushl %ebx
/* Stack frame for the timespec and timeval structs. */
subl $8, %esp
leal cond_nr_wakers(%eax), %ebp /* cond */
movl %edx, %edi /* timeout */
9: movl (%ebp), %esi
testl %esi, %esi
jne 5f
LOCK
decl cond_lock-cond_nr_wakers(%ebp)
jne 6f
/* Get current time. */
7: movl %esp, %ebx
xorl %ecx, %ecx
movl $SYS_gettimeofday, %eax
int $0x80
/* Compute relative timeout. */
movl 4(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%edi), %ecx
movl 4(%edi), %edx
subl (%esp), %ecx
subl %eax, %edx
jns 3f
addl $1000000000, %edx
decl %ecx
3: testl %ecx, %ecx
js 4f /* Time is already up. */
movl %ecx, (%esp) /* Store relative timeout. */
movl %edx, 4(%esp)
movl %esi, %edx
movl %esp, %esi
xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
movl %ebp, %ebx
movl $SYS_futex, %eax
int $0x80
movl %eax, %edx
movl $1, %eax
LOCK
xaddl %eax, cond_lock-cond_nr_wakers(%ebp)
testl %eax, %eax
jne 8f
cmpl $-ETIMEDOUT, %edx
jne 9b
4: movl $ETIMEDOUT, %eax
jmp 2f
5: decl (%ebp)
xorl %eax, %eax
2: addl $8, %esp
popl %ebx
popl %esi
popl %edi
popl %ebp
ret
6: leal cond_lock-cond_nr_wakers(%ebp), %eax
/* Preserves %ebx, %ecx, %edx, %edi, %esi. */
call __lll_mutex_unlock_wake
jmp 7b
8: leal cond_lock-cond_nr_wakers(%ebp), %ecx
/* Preserves %ebx, %edx, %edi, %esi. */
call __lll_mutex_lock_wait
jmp 5b
1: movl $EINVAL, %eax
ret
.size __lll_cond_timedwait,.-__lll_cond_timedwait
.global __lll_cond_wake
.type __lll_cond_wake,@function
.hidden __lll_cond_wake
.align 16
__lll_cond_wake:
pushl %esi
pushl %ebx
movl %eax, %ebx
movl $1, %eax
LOCK
xaddl %eax, (%ebx)
testl %eax, %eax
jne 1f
2: leal cond_nr_wakers(%ebx), %ebx
cmpl $0, cond_nr_sleepers-cond_nr_wakers(%ebx)
je 3f
incl (%ebx)
jz 5f
6: movl $FUTEX_WAKE, %ecx
xorl %esi, %esi
movl %ecx, %edx /* movl $1, %edx */
movl $SYS_futex, %eax
int $0x80
3: LOCK
decl cond_lock-cond_nr_wakers(%ebx)
je,pt 4f
leal cond_lock-cond_nr_wakers(%ebx), %eax
call __lll_mutex_unlock_wake
4: popl %ebx
popl %esi
ret
1: movl %ebx, %ecx
call __lll_mutex_lock_wait
jmp 2b
5: movl $0x80000000, (%ebx)
jmp 6b
.size __lll_cond_wake,.-__lll_cond_wake
.global __lll_cond_broadcast
.type __lll_cond_broadcast,@function
.hidden __lll_cond_broadcast
.align 16
__lll_cond_broadcast:
pushl %esi
pushl %ebx
movl %eax, %ebx
movl $0x8000000, %edx
movl $1, %eax
LOCK
xaddl %eax, (%ebx)
testl %eax, %eax
jne 1f
2: leal cond_nr_wakers(%ebx), %ebx
cmpl $0, cond_nr_sleepers-cond_nr_wakers(%ebx)
je 3f
orl %edx, (%ebx)
6: movl $FUTEX_WAKE, %ecx
xorl %esi, %esi
movl $SYS_futex, %eax
int $0x80
3: LOCK
decl cond_lock-cond_nr_wakers(%ebx)
je,pt 4f
leal cond_lock-cond_nr_wakers(%ebx), %eax
call __lll_mutex_unlock_wake
4: popl %ebx
popl %esi
ret
1: movl %ebx, %ecx
call __lll_mutex_lock_wait
jmp 2b
.size __lll_cond_broadcast,.-__lll_cond_broadcast
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